The pleasure or satisfaction you feel when something you wanted finally happens or is given to you.
From Latin 'gratificari' (to do a favor), combining 'gratus' (pleasing) and 'facere' (to make), evolved to mean the emotional reward itself.
Delayed gratification—waiting for dessert instead of eating it immediately—is one of the best predictors of future success, which is why this single concept shaped psychological research for decades.
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